JP2009142883A - Press machine - Google Patents

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JP2009142883A
JP2009142883A JP2007325468A JP2007325468A JP2009142883A JP 2009142883 A JP2009142883 A JP 2009142883A JP 2007325468 A JP2007325468 A JP 2007325468A JP 2007325468 A JP2007325468 A JP 2007325468A JP 2009142883 A JP2009142883 A JP 2009142883A
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press
pump
control unit
hydraulic control
hydraulic
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JP4919946B2 (en
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Seiji Tanizawa
清司 谷澤
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Meiki Seisakusho KK
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Meiki Seisakusho KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a press machine capable of constituting a hydraulic control unit for controlling and operating a plurality of press units at a low cost, and capable of achieving energy-saving and also reducing operation costs. <P>SOLUTION: The press machine 1 is used for controlling and operating a plurality of press units 2 by one hydraulic control unit 4. The press unit 2 has a servo valve 3. The hydraulic control unit 4 has a pump 9 for discharging hydraulic oil and an accumulator 6 for storing the hydraulic oil. Either of the press unit 2 or the hydraulic control unit 4 has a selector valve 5 for alternatively selecting the hydraulic oil of the pump 9 or the hydraulic oil of the accumulator 6 to supply it to the press units 2, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、複数のプレスユニットを一の油圧制御ユニットで制御・運転するプレス装置に関するものである。   The present invention relates to a press apparatus that controls and operates a plurality of press units with a single hydraulic control unit.

従来、油圧プレスは、例えば特許文献１に示すように、油圧プレス自体にポンプユニット、アキュムレータ及びサーボ弁等からなる油圧制御駆動装置を備えている。そのため、油圧プレスを複数並設する場合には、油圧制御駆動装置も油圧プレスと同数必要になり、大きな設備コストが要求される。この問題に対しては、例えば特許文献２に記載があるように共用ポンプを採用することである程度解決する。   Conventionally, as shown in Patent Document 1, for example, a hydraulic press includes a hydraulic control drive device including a pump unit, an accumulator, a servo valve, and the like in the hydraulic press itself. Therefore, when a plurality of hydraulic presses are arranged side by side, the same number of hydraulic control drive devices as the hydraulic presses are required, and a large equipment cost is required. This problem can be solved to some extent by adopting a shared pump as described in Patent Document 2, for example.

しかしながら、特許文献２の共用ポンプの技術によれば、プレスの主シリンダの油圧を制御するリリーフ弁は、設定圧力の圧油をタンクに戻すように作動するので、大きな電力損失を生じさせる。また、特許文献２におけるポンプは一の固定吐出型ポンプのみであり、本願のプレス装置のように長時間の圧力保持作動を必要としその間に他のプレス装置の開閉作動が入り込むというような実施形態には適用不可能である。   However, according to the technique of the shared pump disclosed in Patent Document 2, the relief valve that controls the hydraulic pressure of the main cylinder of the press operates to return the set pressure oil to the tank, which causes a large power loss. Moreover, the pump in patent document 2 is only one fixed discharge type pump, and requires the long time pressure holding operation like the press apparatus of this application, and the opening / closing operation | movement of another press apparatus enters in the meantime. Is not applicable.

特開２００２−１７２５００号公報Japanese Patent Laid-Open No. 2002-172500 実公平１−３３２２８号公報No. 1-332228

本発明は、上記した問題を解決すべくなされたものであって、複数のプレスユニットを制御・運転する油圧制御ユニットを低コストで構成できるとともに、省エネが実現でき運転コストも低減可能なプレス装置を提供することを目的とする。   The present invention has been made to solve the above-described problems, and can form a hydraulic control unit that controls and operates a plurality of press units at a low cost, achieves energy saving, and can reduce the operating cost. The purpose is to provide.

本発明は、複数のプレスユニットを一の油圧制御ユニットで制御・運転するプレス装置であって、前記プレスユニットはサーボバルブを有し、前記油圧制御ユニットは圧油を吐出するポンプと圧油を蓄圧するアキュムレータを有し、前記プレスユニット及び前記油圧制御ユニットのいずれかのユニットは前記複数のプレスユニットの各々へ前記ポンプの圧油又は前記アキュムレータの圧油を択一的に選択して供給する切換弁を有するプレス装置に関する。   The present invention is a press device that controls and operates a plurality of press units with a single hydraulic control unit, the press unit having a servo valve, and the hydraulic control unit includes a pump that discharges pressure oil and a pressure oil. An accumulator for accumulating pressure is provided, and one of the press unit and the hydraulic control unit selectively selects and supplies the pressure oil of the pump or the pressure oil of the accumulator to each of the plurality of press units. The present invention relates to a press apparatus having a switching valve.

本発明のプレス装置によれば、複数のプレスユニットを制御・運転する油圧制御ユニットを低コストで構成できるとともに、省エネが実現でき運転コストも低減可能となる。   According to the press device of the present invention, a hydraulic control unit that controls and operates a plurality of press units can be configured at low cost, energy saving can be realized, and operation cost can be reduced.

図面に基づいて、本発明の実施の形態を詳細に説明する。図１は、本発明を実施するプレス装置の油圧制御ユニットを含む構成図である。   Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram including a hydraulic control unit of a press apparatus embodying the present invention.

プレス装置１は、複数のプレスユニット２と、それらを制御・運転する一の油圧制御ユニット４とからなる。   The press apparatus 1 includes a plurality of press units 2 and one hydraulic control unit 4 that controls and operates them.

プレスユニット２は、多段の熱板（不図示）を固定盤（不図示）と可動盤１８の間に等間隔で配設し、熱板間に挿入した成形材料を可動盤１８の下面に設け油圧シリンダ２０に嵌挿したラム１９で熱板とともに圧締して成形するプレス本体１７と、前記油圧シリンダ２０へ制御された圧油を供給するため油圧シリンダ２０の近傍に取付けたサーボバルブ３とからなる。   In the press unit 2, multi-stage hot plates (not shown) are arranged at regular intervals between a fixed plate (not shown) and the movable plate 18, and a molding material inserted between the hot plates is provided on the lower surface of the movable plate 18. A press main body 17 that is pressed together with a hot plate by a ram 19 inserted into the hydraulic cylinder 20 and molded, and a servo valve 3 mounted in the vicinity of the hydraulic cylinder 20 for supplying controlled hydraulic oil to the hydraulic cylinder 20 Consists of.

油圧制御ユニット４は、作動油のタンク１１と、タンク１１から作動油を吸引して加圧し圧油を吐出するポンプ９と、ポンプ９を回転駆動するモータ１０と、ポンプ９から吐出された圧油を導く管路１２と、管路１２に一方の入力ポートで接続される複数の切換弁５と、管路１２に開閉弁８を介した管路１３で接続されるアキュムレータ６と、アキュムレータ６の管路１３から開閉弁７を介して複数の切換弁５の他方の入力ポートに接続される管路１４とからなる。なお、ポンプ９は可変吐出量ポンプであってもよい。また、ポンプ９が固定吐出量ポンプである場合には、モータ１０はサーボモータやインバータ駆動の誘導モータのような変速自在に制御されるモータであることが好ましい。またさらに、管路１３にはアキュムレータ６に蓄圧する圧油の圧力を規定するリリーフ弁等の圧力調整弁が必要であるが図示を省略する。   The hydraulic control unit 4 includes a hydraulic oil tank 11, a pump 9 that sucks and pressurizes the hydraulic oil from the tank 11 and discharges the pressurized oil, a motor 10 that rotationally drives the pump 9, and a pressure discharged from the pump 9. A conduit 12 for guiding oil, a plurality of switching valves 5 connected to the conduit 12 at one input port, an accumulator 6 connected to the conduit 12 via an on-off valve 8, and an accumulator 6 The pipe 14 is connected to the other input port of the plurality of switching valves 5 through the on-off valve 7 from the pipe 13. The pump 9 may be a variable discharge pump. In the case where the pump 9 is a fixed discharge pump, the motor 10 is preferably a motor that is controlled so as to be freely variable, such as a servo motor or an inverter-driven induction motor. Furthermore, the pipe line 13 requires a pressure regulating valve such as a relief valve that regulates the pressure of the pressure oil accumulated in the accumulator 6.

切換弁５は、ポンプ９の圧油を供給する管路１２を接続する一方の入力ポートと、アキュムレータ６の圧油を供給する管路１４を接続する他方の入力ポートとを有し、図示しない制御装置の信号に基づいて一方の入力ポートと他方の入力ポートのいずれかの入力ポートを択一的に選択して出力ポートへ連通させる。ただし、切換弁５は、一方の入力ポートと他方の入力ポート以外にいずれのポートへも連通せず管路１２が閉鎖される状態となる中立の切換位置が設けられるものであることが、アキュムレータ６への蓄圧作動を良好に実行させる点で好ましい。   The switching valve 5 has one input port for connecting the pipe line 12 for supplying the pressure oil of the pump 9 and the other input port for connecting the pipe line 14 for supplying the pressure oil of the accumulator 6. Based on the signal from the control device, either one of the input port and the other input port is selected and communicated to the output port. However, the switching valve 5 is provided with a neutral switching position that does not communicate with any port other than the one input port and the other input port, and the pipe 12 is closed. 6 is preferable in that the pressure accumulating operation to 6 can be performed satisfactorily.

切換弁５の出力ポートには管路１５が接続され、管路１５の他端はサーボバルブ３の入力ポートに接続されている。サーボバルブ３の出力ポートはプレス本体１７の油圧シリンダに接続されている。サーボバルブ３にはドレンポートが設けられ、ドレンポートは管路１６で油圧制御ユニット４のタンク１１に接続されている。   A pipe 15 is connected to the output port of the switching valve 5, and the other end of the pipe 15 is connected to the input port of the servo valve 3. The output port of the servo valve 3 is connected to the hydraulic cylinder of the press body 17. The servo valve 3 is provided with a drain port, and the drain port is connected to the tank 11 of the hydraulic control unit 4 through a pipe line 16.

切換弁５は、各プレスユニット２と油圧制御ユニット４との設置距離が比較的近く、管路１５，１６の敷設が短距離である場合には、図１に示すように、油圧制御ユニット４に設けられることが好ましい。しかしながら、各プレスユニット２と油圧制御ユニット４との設置距離が比較的遠く、かつ、プレスユニット２同士の間隔が十分近い場合には、プレスユニットと油圧制御ユニットとの管路が二本のみでよいことから、切換弁をプレスユニット２に設けることが有利となる。   When the installation distance between each press unit 2 and the hydraulic control unit 4 is relatively short and the laying of the pipes 15 and 16 is a short distance, as shown in FIG. It is preferable to be provided. However, when the installation distance between each press unit 2 and the hydraulic control unit 4 is relatively long and the distance between the press units 2 is sufficiently close, only two pipe lines are provided between the press unit and the hydraulic control unit. For this reason, it is advantageous to provide a switching valve in the press unit 2.

次に、プレス装置１の作動について詳細に説明する。複数のプレスユニット２のうち任意のプレスユニット２を成形開始させるため、プレス本体１７のラム１９を上昇させる。このとき、成形開始させるプレスユニット２以外のプレスユニット２は成形開始しないようにシーケンス制御プログラム上でインタロックが施されている。そして、ポンプ９は設定されたラム１９上昇速度に応じた吐出を行う。ラム１９を上昇させるプレスユニット２に対応する切換弁５は管路１２が管路１５に連通するように切換えられ、それ以外の切換弁５は閉となっている。ラム１９を上昇させるプレスユニット２に対応するサーボバルブ３は、管路１５から油圧シリンダ２０へ全開状態で連通するようになっている。開閉弁７，８は閉となっている。ラム１９はポンプ９の吐出量を変化させることにより適宜な速度プログラムで上昇する。このように、ポンプ９は、ラム１９の上昇移動に必要な量のみ圧油を吐出し、ラム１９が上昇移動しないときは停止しているので、固定吐出量ポンプを定回転モータで駆動する場合のようにラム１９が上昇移動しないときも吐出することに起因する電力損失を回避させることが出来る。   Next, the operation of the press apparatus 1 will be described in detail. In order to start forming an arbitrary press unit 2 among the plurality of press units 2, the ram 19 of the press body 17 is raised. At this time, the press units 2 other than the press unit 2 to start forming are interlocked on the sequence control program so as not to start forming. The pump 9 performs discharge according to the set ram 19 ascent speed. The switching valve 5 corresponding to the press unit 2 that raises the ram 19 is switched so that the pipe 12 communicates with the pipe 15, and the other switching valves 5 are closed. The servo valve 3 corresponding to the press unit 2 that raises the ram 19 communicates from the pipe line 15 to the hydraulic cylinder 20 in a fully opened state. The on-off valves 7 and 8 are closed. The ram 19 is raised by an appropriate speed program by changing the discharge amount of the pump 9. As described above, the pump 9 discharges the pressure oil only in an amount necessary for the upward movement of the ram 19 and is stopped when the ram 19 does not move upward, so that the fixed discharge amount pump is driven by a constant rotation motor. Thus, even when the ram 19 does not move up, it is possible to avoid the power loss caused by the discharge.

ラム１９と熱板が上昇して全ての成形材料が上方の熱板に密着したとき、そのプレス本体１７に対応する切換弁５は管路１４が管路１５に連通するように切換えられるとともに、開閉弁７が開となる。それにより、プレス本体１７の油圧シリンダ２０にはアキュムレータ６に蓄圧された圧油がサーボバルブ３を介して供給される。このとき、サーボバルブ３は、油圧シリンダ２０内の油圧力が図示しない制御装置で設定された値となるようフィードバック制御されて、適宜な開度に調節され成形材料の圧縮・保圧制御を行う。このフィードバック制御は、成形材料の圧縮に基づく僅かな圧油の不足を補うように制御されるのであり、圧油の流量は少量であるから、プレス成形に特有の１時間にも及ぶ長時間の保圧成形制御であっても、アキュムレータ６の蓄圧油量で十分賄えるとともに、僅かな電力消費量で済むのである。これに対し、従来のように、油圧シリンダの油圧制御にリリーフ弁を用いた場合には、多量の圧油をタンクに戻すこととなるので、アキュムレータの蓄圧油量では保圧制御を継続させることが困難であるとともに、大きな電力消費を招くのである。   When the ram 19 and the hot plate rise and all the molding material comes into close contact with the upper hot plate, the switching valve 5 corresponding to the press body 17 is switched so that the pipe line 14 communicates with the pipe line 15. The on-off valve 7 is opened. Thereby, the hydraulic oil accumulated in the accumulator 6 is supplied to the hydraulic cylinder 20 of the press body 17 via the servo valve 3. At this time, the servo valve 3 is feedback-controlled so that the hydraulic pressure in the hydraulic cylinder 20 becomes a value set by a control device (not shown), and is adjusted to an appropriate opening degree to perform compression / holding control of the molding material. . This feedback control is controlled so as to compensate for a slight shortage of pressure oil based on compression of the molding material. Since the flow rate of the pressure oil is small, the feedback control is performed for a long time as long as 1 hour, which is typical for press molding. Even in the pressure-holding molding control, the accumulator 6 can sufficiently cover the amount of accumulated oil, and only a small amount of power is consumed. On the other hand, when a relief valve is used for hydraulic control of a hydraulic cylinder as in the past, a large amount of pressure oil is returned to the tank, so the pressure holding control is continued with the amount of accumulated oil in the accumulator. This is difficult and causes a large power consumption.

任意の一又は複数のプレス本体１７が保圧制御中には、他の一のプレス本体１７は成形開始のためラム１９を上昇開始させることが出来る。この作動工程は前記と同様である。また、いずれのプレス本体１７もラム１９の上昇工程を実行していないときには、開閉弁８を開きポンプ９を略最大の吐出量にしてアキュムレータ６に所定圧力の圧油を供給しアキュムレータ６を蓄圧する。各プレス本体１７が保圧（冷却）工程を終了したときには、そのプレス本体１７に対応するサーボバルブ３を油圧シリンダ２０から管路１６に適宜な開度で連通させて、ラム１９の下降速度制御を実行する。ラム１９が下降完了したことにより、そのプレス本体１７における成形工程が終了する。   While any one or a plurality of press bodies 17 are under pressure holding control, the other one press body 17 can start raising the ram 19 to start forming. This operation process is the same as described above. Further, when none of the press bodies 17 perform the ascending process of the ram 19, the on-off valve 8 is opened and the pump 9 is set to a substantially maximum discharge amount to supply a predetermined pressure of pressurized oil to the accumulator 6 to accumulate the accumulator 6. To do. When each press main body 17 finishes the pressure holding (cooling) process, the servo valve 3 corresponding to the press main body 17 is communicated from the hydraulic cylinder 20 to the pipe line 16 at an appropriate opening degree to control the lowering speed of the ram 19. Execute. When the ram 19 has been lowered, the molding process in the press body 17 is completed.

この発明は以上説明した実施例に限定されるものではなく、発明の趣旨を逸脱しない範囲内において種々の変更を付加して実施することができる。   The present invention is not limited to the embodiments described above, and various modifications can be added and implemented without departing from the spirit of the invention.

本発明を実施するプレス装置の油圧制御ユニットを含む構成図である。It is a block diagram including the hydraulic control unit of the press apparatus which implements this invention.

符号の説明Explanation of symbols

１ プレス装置
２ プレスユニット
３ サーボバルブ
４ 油圧制御ユニット
５ 切換弁
６ アキュムレータ
７，８ 開閉弁
９ ポンプ
１０ モータ
１１ タンク
１２ ，１３，１４，１５，１６ 管路
１７ プレス本体
１８ 可動盤
１９ ラム
２０ 油圧シリンダ DESCRIPTION OF SYMBOLS 1 Press apparatus 2 Press unit 3 Servo valve 4 Hydraulic control unit 5 Switching valve 6 Accumulator 7, 8 On-off valve 9 Pump 10 Motor 11 Tank 12, 13, 14, 15, 16 Pipe line 17 Press main body 18 Movable board 19 Ram 20 Hydraulic pressure Cylinder

Claims (2)

複数のプレスユニットを一の油圧制御ユニットで制御・運転するプレス装置であって、
前記プレスユニットはサーボバルブを有し、前記油圧制御ユニットは圧油を吐出するポンプと圧油を蓄圧するアキュムレータを有し、前記プレスユニット及び前記油圧制御ユニットのいずれかのユニットは前記複数のプレスユニットの各々へ前記ポンプの圧油又は前記アキュムレータの圧油を択一的に選択して供給する切換弁を有することを特徴とするプレス装置。 A press device that controls and operates a plurality of press units with a single hydraulic control unit,
The press unit includes a servo valve, the hydraulic control unit includes a pump that discharges pressure oil and an accumulator that accumulates pressure oil, and any one of the press unit and the hydraulic control unit includes the plurality of presses. A press apparatus comprising a switching valve that selectively supplies the pressure oil of the pump or the pressure oil of the accumulator to each unit. 前記ポンプは、変速自在に制御されるモータで駆動される請求項１に記載のプレス装置。   The press apparatus according to claim 1, wherein the pump is driven by a motor that is controlled to be freely variable.
JP2007325468A 2007-12-18 2007-12-18 Press machine Expired - Fee Related JP4919946B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020040107A (en) * 2018-09-13 2020-03-19 住友重機械工業株式会社 Hydraulic press and operation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05104298A (en) * 1991-10-18 1993-04-27 Hoden Seimitsu Kako Kenkyusho Ltd Progressive machining device
JP2002120096A (en) * 2000-10-18 2002-04-23 Amada Co Ltd Hydraulic operating system and handling method thereof
JP2004160529A (en) * 2002-11-15 2004-06-10 Uk:Kk Double acting hydraulic press

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05104298A (en) * 1991-10-18 1993-04-27 Hoden Seimitsu Kako Kenkyusho Ltd Progressive machining device
JP2002120096A (en) * 2000-10-18 2002-04-23 Amada Co Ltd Hydraulic operating system and handling method thereof
JP2004160529A (en) * 2002-11-15 2004-06-10 Uk:Kk Double acting hydraulic press

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020040107A (en) * 2018-09-13 2020-03-19 住友重機械工業株式会社 Hydraulic press and operation method thereof
JP7120724B2 (en) 2018-09-13 2022-08-17 住友重機械工業株式会社 Hydraulic press and its operating method

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